We tried a lot of reusable takeaway cups and wanted to do better. This one is steel, so it won't crack, and every part can be replaced, so a lost lid doesn't mean a new cup.
The cork sleeve keeps your hands comfortable, as the steel gets hot. The lid has a stopper to cut down on spills. Not leakproof or insulated: made for your coffee on the way to work. Spare lids and sleeves here.